I just found out I'm pregnant and have been coloring my hair with Loreal for a few years but want to see about trying Ecocolors. I'm confused by one of the previous posts which was a question about bleaching. So it's not a good idea to use Ecocolors over previously dyed hair or just bleached hair? I've been very vain with this pregnancy and really don't want to give up coloring my hair. Any suggestions???